Radial drilling machine



Feb. 9, 1943. v. RETTER-ATH 2,310,870

RADIAL DRILLING MACHINE Filed Api-i1 s, 1940 s sheets-sheet 1 Feb. 9, 1943. v. RETTERATH 2,310,870

4 A RADIAL DRLLING MACHINE Filed April a, 1940 ay sheets-sheet 2 Feb. 9, 1943. v. RETTERATH 2,310,870

RADIAL DRIILING MACHINE Filed April 8, 1940 5 Sheets-Sheet 5 Patented Feb. 9, 1943 RADIAL DRILLING MACHINE Valentin Retterath, Ivershem, near Munstereifel,

Germany; vested in the Alien Property Custodian Application April 8, 1940, Serial No. 328,541 In Germany April 15, 1939 Claims.

This invention relates to a radial drilling machine.

In so-called universal radial drilling machines constructed either with a column or with a rotary jacket on the column the position of the drill spindle can be varied relative to the work by displacing the arm on the column or by adjusting the housing of the saddle on the arm.

The invention is applicable to both types vof known radial drills and proposes to increase.v the adjustability of the drill spindle with respect to the work to such an extent that it complies more fully with the requirements which a truly universal radial drilling machine should meet than the known drills of this class and, furthermore, combines increased adjustability with very simple design and considerable output.

In order to attain its object the invention provides rst for rotatability of the arm supporting the housing of the saddle about its longitudinal axis through 360, so that the drill spindle, seen in the vertical plane, can occupy any desired angular position. If the machine is of the pillar type, the arm is arranged in a slide capable of moving up and down on the column in known manner and is rotatable about its longitudinal axis in the slide by means of a bushing disposed in the slide and rotatable by a worm gearing or other suitable means. If, on the other hand, the machine is tted with a rotary jacket or shell, the arm is positioned with its inner end on the jacket and can be turned 360, in which case the part of the housing of the saddle embracing the arm need not be swingable about the longitudinal axis of the arm but may be swung 360 about an axis disposed perpendicularly thereto, whereby angular adjustment of the drill spindle in a cylindrical area about the longitudinal axis of the arm is insured.

When the arm is rotatable 360 at its inner end located 4on the rotary jacket, longitudinal displacement of the drill spindle is preferably effected by displacing the housing of the saddle on the arm, whereas if the arm itself is longitudinally displaceable in a slide on the column, the housing of the saddle is rotatably but not longitudinally displaceably arranged thereon. This can be brought about by rendering the arm displaceable in a bushing or sleeve, for instance by means -of a worm gearing, the sleeve being disposed in a slide capable of vertical traverse.

In the latter instance, slewability of the entire arm structure on the column can be attained .by

this type may be rotatable at its base about a vertical axis to obtain the same effect as in the known machine with rotary jacket.

It will be seen that, according to the invention, the drill spindle in radial drilling machines of both the column and rotary jacket type may practically occupy any desired position, whereby the machineability of different kinds of work is greatly facilitated.

The invention is further concerned with a par ticular construction of the arm and the arrangement of the driving motor for the drill spindle. According to the invention, the arm formf a hollow body having a circular cross section and containing at one end a driving motor for the drill spindle. The inside of the arm is preferably tted with opposed spirallike reinforcing ribs.

In View of the fact that the invention provides for a greater adjustability of the drill .spindle than is found in known machines, the operating elements for displacing the spindle are preferably disposed on two opposite sides of the housing of the saddle.

Two embodiments of the invention are diagrammatically illustrated by way of example in the accompanying drawings, in which Figure 1 is a front view, partly in section, of a radial drilling machine of the column type according to the invention;

Fig. 2, a side view, partly in section, of the arm on the housing of the saddle;

Fig. 3, a front view of a radial drilling machine having a rotary jacket;

Fig. 4, a side view, partly in section, of the arm and of the housing of the saddle of the machine shown in Fig. 3;

Fig. 5, a plan view, on a reduced scale. of the arm on the housing of the saddle in the machine shown in Fig. 3; and

Fig. 6, a partial section, on an enlarged scale, of the arm shown in Fig. 3.

In 'the various figures the diierent possibilities of adjusting the drill spindle are diagrammatically indicated.

The radial drilling machine shown in Fig. 1 comprises a machine bed I supporting a column or standard 2 which is longitudinally displaceable. Between a member 3 and the column 2 slewability of the latter about its vertical axis 4 is attained by corresponding bearings or bearing arrangements. To secure the column 2 in position after it has performed a desired motion screws 5 can engage an annular dovetail groove being concentric with the axis 4 and positioned in the member 3. In prismatic guides 6 a slide 'l is vertically movable on the column 2 and provided with a rotary member 8 which can be swung about a shaft 9 and to which a casing I0 is connected. The rotary member 8 has the form of a worm Wheel and is in mesh with a worm II disposed on the slide 1. The worm II is driven by means of an operating lever I2 and a transmission gearing I3, I4, whereby the Worm Wheel 8 and the casing I6 secured thereto are turned. The casing I6 embraces a bushing I5 provided with a worm toothing I6 and movable about the longitudinal axis of the casing I with the aid of an operating lever I6 Whose shaft I1 supports a worm gear I8 in mesh with-the toothing I6', the shaft I1 being disposed on the casing ID.

In the bushing I an arm or tubular carrier I9 is positioned which possesses a toothing 2U by means of which it can be longitudinally displaced within the bushing I5 whilst a groove 2I and a tongue 22 on the bushing I5 prevent rotation thereof. Operation is effected by means of a handle 23 arranged with a pinion 24 on a shaft 25 and in mesh with the toothing 20 of the arm I9. The bearing of the shaft 25 is connected with the bushing I5 and can therefore cooperate in any motion thereof.

As indicated by the positions I and II, the arm I9 can be moved up about the shaft 9 and moved down on the slide 1. Furthermore, independently from these motions the arm I9 may be displaced in longitudinal direction within the bushing I5 to place the drill spindle closer to or farther away from the column 2.

As the arm or tubular carirer I9 is movable Within the member I5, displaceable arrangement l of the housing 26Y of the saddle with its drill spindle 21-on the arm I9 is not required; It is further not necessary that the housing 26 with its portion 28 surrounding the arm I9 should be rotatable about the longitudinal axis of the arm, since this rotary motion for attaining the different positions of the spindle 21, Fig. 2, can be performed by moving the arm I9Y Within the bushing I5.

With respect to the rotary motions of the drill spindle 21 indicated in Fig. 1 it may be said that the casing portion 2B embracing the arm I9 has a ange 29 provided with a. circular dovetail groove 30 which is engaged by guides 3l firmly united with the housing 26 which, together with the drill spindle 21, can therefore be turned in the groove 3U as indicated in Fig. 1.

The hollow arm I9 of circular cross section carries on its left-hand end a motor 32.which drives bevel gears 34, 35, 86 and 31 by means of shaft 33 and intermediate shaft 35. A shaft 38 connected with the bevel gear 31 drives the drill spindle 21, and the distance between the motor 32 and the spindle 21 remains constant in this case.

To the left and right of the housing 26 of the saddle handles 39'are disposed on a shaft 48 connected with a pinion 4I which is in mesh with a toothing 42 of the drill spindle 21 so as to permit displacement of the spindle within the housing 26 of the saddle.

In the construction shown in Fig. 3 a machine bed 43 supports a conical column 44 provided with a rotary jacket 45. The inner end of the arm 46 is connected with the rotary jacket 45 through a disc 41 and a prismatic guide 48. With the aid of the disc 41 the arm 46 can be turned 360 about its longitudinal axis, the rotation being effected by means of guides 49 connected with the disc 41 and engaging a circular dovetail groove 50 of the guide 48.

The arm 46 is not longitudinally displaceable relative to the rotary jacket 45, but the portion 52 of the housing 5I of the saddle surrounding the arm 46 can be moved to and fro on the arm by means of a handle 53 whose shaft 54 is arranged in the rotary disc 41. A bevel gear 55 disposed on the shaft 54 is in mesh with a bevel gear 56 connected with a threaded spindle 51 provided with nuts 58 which are secured to a guide member 59 moving in a slot of the arm 46 and rmly attached to the housing portion 52. By turning the handle 53 the bevel gears 55, 56

y will be caused to drive the threaded spindle 51 fitted with the nuts 58. As the nuts 58 are firmly united with the guide member 59, the housing portion 52 embracing the arm 46 as Well as the housing 5I of the saddle will be displaced. The rotary disc 41 is, moreover, arranged on its prismatic guide 48 on the rotary jacket 45 in such manner that the drill spindle 21 together with the arm 46 can be raised and lowered.

The housing 5I of the saddle can also be rotated 360 relative to the housing member 52 with the aid of guides 60 rmly united with the housing 5I and engaging a circular dovetail groove 6I of the housing member 52.

The driving motor 62 for the drill spindle 21 is in this case built into the outer end of the arm 46, and satisfactory driving of the drill spindle Cil 21 is insured by corresponding bevel gearing in spite'of the displacement of the housing 5I of the saddle in the direction of the longitudinal axis of the arm 46.

The motor 62 drives bevel gears 64-61 by means of a shaft 63. A shaft 68 connected with the bevel gear 61 drives the drill spindle 21. As the housing 5I of the saddle and the gear members thereof as well as the housing member 52 embracing the arm 46 can be displaced on the latter, the bevel gear 64 on the motor shaft 63 has to be displaced also for which purpose the shaft 68 supporting the bevel gears 64, 65 is embraced by a bushing 69 whose projecting portion 10 engages an annular groove of the bevel gear 64. Handles 39 serve in the manner described for displacing the drill spindle 21 Within the housing 5I of the saddle.

Fig. 3 indicates several possibilities of adjusting thehousing 5I of the saddle in the groove 6I and thereby the position of the drill spindle 21. Fig. 4 indicates different positions which the drill spindle 21 may occupy according to the rotation of the arm 46 about the disc 41. Fig. 5 shows that the arm 46 can be swung Iabout the axis of the conical column 44 and, by rotation of the arm 46' itself and of the housing 5I of the saddle 0n theV arm, the drill spindle 21 can be adjusted over a wide range.

Fig. 6 is aA longitudinal section of a part of the arm 46 and' indicates a manner of arranging spiral reinforcing ribs 1I, 12 thereon.

What is claimed is:

1. A radial drilling machine comprising a longitudinally adjustable standard rotatable about its longitudinal axis, a tubular carrier mounted for longitudinal movement on said standard, a drill spindle housing oscillatably and rotatably arranged at an end of said carrier, a drive motor mounted in one end of said tubular carrier, a motor shaft therefor coinciding with the longitudinal axis of said carrier, a drill spindle, a drive shaft therefor disposed perpendicularly to the longitudinal axis of said carrier and an intermediate shaft transmitting the drive from said motor shaft to said drill spindle drive shaft.

2. A radial drilling machine comprising a longitudinally adjustable standard rotatable about its longitudinal axis, a tubular carrier mounted for longitudinal movement on said standard, a drill spindle housing oscillatably and rotatably arranged at an end of said carrier, a drive motor mounted in one end of said tubular carrier, a motor shaft therefor coinciding With the longitudinal axis of said carrier, a drill spindle, a drive shaft therefor disposed perpendicularly to the longitudinal axis of said carrier and an intermediate shaft arranged perpendicularly to the longitudinal axis of said carrier transmitting the drive from said motor shaft to said drill spindle drive shaft.

3. A radial drilling machine as set forth in claim 1 in which a guide head is provided for said tubular carrier.

4. A radial drilling machine as set forth in claim l wherein the drill spindle housing mounted on said tubular carrier is provided With manual manipulating elements.

5. A radial drilling machine comprising a longitudinally adjustable standard rotatable about its longitudinal axis, a tubular carrier mounted for longitudinal movement on said standard, a drill spindle housing oscillatably and rotatably arranged at an end of said carrier, a drive motor mounted in one end of said tubular carrier, a motor` shaft therefor coinciding With the longitudinal axis of said carrier, a drill spindle, la drive shaft therefor disposed perpendicularly to the longitudinal axis of said carrier and an intermediate shaft transmitting the drive from said motor shaft to said drill spindle drive shaft, and bevel gears mounted upon said motor drive shaft, said intermediate shaft and said drill spindle drive shaft for transmitting the drive from said motor drive shaft to said drill spindle drive shaft.

VALENTIN RETTERATH. 

